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Seabridge Gold


Historical Exploration

Exploration was conducted on the property under a management committee over a 10 year period until 2013. The work consisted of:

  • Surface geochemistry totalling more than 12,000 samples.
  • Nearly 466,000 ground magnetic survey readings.
  • Detailed gravity readings at 4,180 sites across the property.
  • Core drilling of 33,245 meters and Reverse Circulation drilling of 17,385 meters.

Between 2014 and May 2017, no field exploration work was conducted on the property as permitting, data compilation and consolidation of ownership were the focus of activities. After consolidation of the ownership in the Company, the surviving owner entered into negotiations with Seabridge. Seabridge Gold secured an undivided 100% interest in the project by acquiring the private company shares based upon its intention to implement a long-term exploration effort towards the discovery of a blind giant Northern Nevada gold deposit.

2018 Exploration Program

Seabridge's first program at Snowstorm was designed to define drill targets before year end. The initial focus was to look for possible extensions of the Getchell Trend in the Osgood Mountains on the western side of the Snowstorm property. This target area has the aeromagnetic signature of the buried northeastern extension of the Osgood Mountain Range. Historical core containing carbonate Paleozoic stratigraphy, which is host to gold deposits in the Osgood Mountains, was reviewed and processed to characterize the clay component in the rock using short wave infrared technology. A key indicator of gold in the Getchell district is a specific alteration clay product associated with metal-bearing hydrothermal fluids. In conjunction with this work, additional geochemical samples were taken from the stratigraphic section. These resulting data helped to establish the location and extent of hydrothermal fluids that have interacted with the favorable carbonate stratigraphy.

A magnetotelluric survey (CSAMT) was completed, covering the western part of the property where drill holes have penetrated the carbonate host stratigraphy. CSAMT has locally been successful at identifying structures that cross the Paleozoic host stratigraphy below the volcanic cover. This 2018 program also included carbonate basin analysis and depositional modeling to provide an understanding of metal traps and additional gravity surveys to map the sub-surface geology and high-density alteration (dolomitization).

2019 Exploration Program

Seabridge initiated a 7000-meter exploration drill program at Snowstorm Project in August. Reverse circulation drilling will take holes to the Paleozoic surface followed by completion with diamond core drilling to target depths.

Targeting concepts are based on analogy to the Turquoise Ridge/Twin Creeks type of high-grade gold systems in the Getchell Trend. Seabridge has determined that the Tend continues into favourable stratigraphy on the Snowstorm Project under thin volcanic rock cover. Twin Creeks and Turquoise Ridge are respectively located about 6 and 15 kilometers southwest of Snowstorm with Turquoise Ridge reporting remaining reserves of 9.1 million ounces grading 13.0 g/T gold and Twin Creeks, 3.2 million ounces grading 1.9 g/T gold. Approximately 7 to 10 coincident structural and stratigraphic targets will be tested. This initial program is expected to provide enough information to refine targeting for subsequent exploration including further geophysical surveys and drilling.

Considerable historical information has been integrated with an array of newly collected data. Ordovician carbonate rock units found in drill holes on the property are part of a sedimentary rock package that accumulated at the base of an offshore seamount, as at Turquoise Ridge and Twin Creeks. In Getchell-style deposits, regional and local deformation provided the required permeability for hydrothermal fluids that dissolved the carbonate rocks, precipitating high concentrations of the most mobile pathfinder elements but only minor amounts of less mobile gold which remained in close proximity to the permissive structures. A Controlled Source Audiomagnetotellurics (CSAMT) survey and a natural source Magnetotelluric (MT) survey have identified the continuation of the favourable Getchell Trend structures onto the Snowstorm property and into the sedimentary package. Historical drilling was generally 400 to 600 meters from the favourable structures.